Double cylinder circular knitting machine



June 10,1952 c. CAMNASIO ETAL 2,600,203

DOUBLE CYLINDER CIRCULAR KNITTING MACHINE Filed NOV. 10, 1949 Fig.2

I/V NT R" C RLO AM/VAs/O -Iowuwv/ A. Vs/vrwmu/ Grasepp: CoLAul Patented June 10, 1952 DOUBLE CYLINDER- CIRCULAR KNITTING MACHINE- Carlo Camnasio," Giovanni Aurelio Venturelll, and Giuseppe Colalupo,- Milan, Italy,' afssign'ors to Oificin'e Moncenisio', gia; B'auchiero, Turin, Italy, a corporation of Italy A tu'catian Noyember 10, 1949, Serial No. 126,561

- In ItalyNovembe'r 17', 1948' 4 Claims. (01. 66-14) This invention relates to double cylinder circular knitting machines for stockings andthe like, and has for itsobject adevice whichwill-enable the upper cylinder to be fitted exactly.

It is well-known that in the machines of this type great difiiculties are met with in fitting the upper cylinder which must be nicely placed inorder that the needles in the lower cylinder run exactly into their places'in'the grooves inth'e-upper cylinder. j 7

Such an operation which must" be frequently repeated, for example when the machine is cleaned or overhauled,,is avery'delicate-one' and able ring comprising sectors of different heights in'such a way that'by the rotation of the said ring it is possible to ensure that the structure carrying the upper cylinder descends vertically in the direction of its axis, and moves from its highest position to its lowest position which is its normal one.

The accompanying drawings show by way of example a specific embodiment of the invention in which:

Figure 1 is a diagrammatic view partly in section of the upper part of a double cylinder circular knitting machine for stockings to which a device according to the invention has been applied;

Figure 2 is a larger scale section of the upper part of the cage carrying the cylinder together with the members resting on it;

Figure 3 is a corresponding plan view;

Figure 4 shows the development of the driving member, and

Figures 5 and 6 are sections of parts of two superposed cylinders showing the two positions occupied by the upper cylinder during fitting operations.

Fig. 7 is a perspective view of a portion of the crown supporting the upper cylinder, with the parts shown in their initial position at the start of the fitting operation;

Fig. 8 is a view similar to'Fig. 7', with the parts in'their final position.

In Figure l, the box I constitutes the upper portion of the base of a knitting machine in which a gearing 2 mountedfor' transmitting-themetion ofa motor (not shown) to gear wheel 3 which is supported on the collar 4 and inte ral withthe lower cylinder 5. The toothedwheel 3 is connected by a pinion 6', the shaft I and a'pinion 8 to the toothed wheel 9 integral with the upper cylinder I0 and supported by a'clam'p II on theupper' edge or crown I 2 of thecage' I 3' fixed to the upper wall of the box The clamp'II carrieson its periphery two studs I4 (Figures 2 and 3) in the'shape of keys which can fit on the circular rim'or fiange'of the crown-'I2'of'thecage I3; these studs being destined to correspond to grooves- IB in-the-Said'rim or flange. On'the uppersideo'f the rim of the crown I2-rests'thelower flat" side of aging. I6 (Figureei the upperside' .of which is made up of sections of" diiierent heights I1 and I8 (Figure'4) connectedtogether by the gradients I9'in the-proximityof the grooves for the keys I41 The ring I6 is provided with a ham dle Zil'by which it may be opera'ted. The assembly'comprising' the upper cylinder I9 and-the toothed wheel9 rests onthe'crown I! of the supporting cage I3 with the ring [6 interposed.

When the upper cylinder I0 is being fitted, the clamp II on which the toothed wheel 9 rests, is placed on the top of cage I3 while care is to be taken that the angular position of the clamp I I is such, that the keys I4 penetrate the grooves I5 arranged vertically in the crown I2.

As a consequence of this fitting operation, the keys I4 happen to ride the ring I6, and the lower face of each key I4 comes to rest on the upper surface of the ring I6.

Consequently while the cylinder I0 is being fitted, the clamp II, which must support it with its toothed wheel 9, rests with the keys I4 on the highest part I! of the ring I6 as can be seen in Figure 2, in which the cylinder I0 is spaced away from the lower cylinder 5.

Hereafter, by acting upon the handle 20, an angular displacement of the ring I6 is effected in order to bring underneath the supporting surface of each key I4 a gradient I9 of the contour of the ring I6 and, successively, the section I8 of the said contour.

During this displacement of the ring I6, the lower supporting surface of the keys I4 descends down the gradient I9 and reaches the section I8 of the upper contour of the ring I6. The clamp I I' and, together with it, the crown I2, as well as the upper cylinder l0, descend gently and uniformly in vertical direction, being guided by the engagement of the keys [4 into the vertical grooves l5 of the crown [2. The lowest position, which the parts occupy at the end of this operation, and which is visible in Fig. 8, is the normal working position of the machine as shown in Fig. 8. In this position the clamp II is resting, with the aid of its keys M, on the sections l8 of the upper contour of the ring l6, which, in turn, rests on the crown l2 of the cage [3.

The two positions, that is to say the highest one before the rotation of the ring I6, and the lowest one or the normal position, are indicated in Figures 5 and 6, where it can be seen that the needles 2i situated in the grooves of the lower cylinder 5 have at the completion of the fitting entered the grooves 23 of the upper cylinder l0.

As can be seen from the preceding, the fitting operation of the upper cylinder is very simple and easy, it being sufiicient for the operator to place the supporting clamp i l of the cylinder exactly in the angular position required which may easily be done due to the keys and the corresponding grooves on the stationary cage, and thereafter rotating the ring I 6 so that the upper cylinder Ill descends to the final position, while maintaining itself centred on its axis.

What we claim is:

1. In a double cylinder knitting machine comprising a stationary cage, a clamp on said cage supporting the upper cylinder, a device for fitting said cylinder comprising means to fix the angular position of said cylinder with respect to said stationary cage, a ring rotatably mounted between said cage and said supporting clamp, sectors of said ring comprising adjacent sections of diflerent height, said supporting clamp resting on said ring in the region of said sectors and means for rotating said ring.

2. In a double cylinder knitting machine comprising a stationary cage, a clamp on said cage supporting the upper cylinder, a device for fitting said cylinder comprising keys on said supporting clamp and corresponding guides on the 46 supporting cage to fix the angular position of said cylinder with respect to the stationary cage, 9. ring rotatably mounted between said cage and said supporting clamp, sectors of said ring comprising adjacent sections of diiferent height, said supporting clamp resting on said ring in the region of said sectors and means for rotating said ring.

3. In a double cylinder knitting machine comprising a stationary cage, a clamp on said cage supporting the upper cylinder, 9, device for fitting said cylinder comprising means to fix the angular position of said cylinder with respect to the stationary cage, a rotatable ring mounted between said cage and said supporting clamp and having a fiat lower side and an upper side comprising sections of greater height and sections of less height and a gradient between said sections, said supporting clamp resting on said ring in the region of said sections, and means for rotating said ring.

4. In a double cylinder knitting machine comprising a stationary cage, a clamp on said cage supporting the upper cylinder, a device for fitting said cylinder comprising keys on said supporting clamp and corresponding guides on the supporting cage to fix the angular position of said cylinder with respect to the stationary cage, a rotatable ring mounted between said cage and said supporting clamp and having a fiat lower side and an upper side comprising sections of greater height and sections of less height and a gradient between said sections, said keys for angular engagement resting on said ring in the region of said sections, and means for rotating said ring.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Wawzonek Jan. 10, 1950 Number 

